7. Kristen Stewart
At 19 years old, she already has an amazing 23 films under her belt. Yet, Kristen Stewart entered 2009 with a lot of questions: Was "Twilight" a fluke? How would the notoriously press-shy starlet handle A-list fame? And would "New Moon" "kill" her, as she promised?
2009 Highlights: It all began in the snowy mountains of Park City, Utah, where a bundled-up KStew arrived at the Sundance Film Festival to discover that paparazzi were everywhere — quite a difference from early 2008, when she walked down the streets unbothered. The "Twilight" star was there to unveil "Adventureland," a sweet coming-of-age drama that was well-received by critics and became a minor hit nationwide in April. Of course, 2010 will start out similarly for Kristen, as she'll be at Sundance next month with two films. Click here to read more